Calculator



FIG. 1 is a top-front and left-side perspective view of a calculator showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right-side elevational view thereof, the left-side elevational view being a mirror image; and,

FIG. 5 is a rear elevational view, the front elevational view being a mirror image. 

The ornamental design for a calculator, as shown and described. 